What happened: McLaren is pairing its reworked MCL40 underbody with smaller component updates aimed at improving braking performance for the Austin race weekend. The package marks a late-season technical push as Formula 1 opens the MSC Cruises United States Grand Prix schedule.

Why it matters: With 17 rounds completed in the 2026 Formula 1 season, the constructors' championship race has tightened entering the Austin leg of the calendar. Extracting consistent downforce and braking stability at COTA is pivotal to protecting constructors' standings points over the closing stretch.

What to watch: Opening practice sessions in Austin will provide the first track data on whether the experimental floor remains on the MCL40 for qualifying and Sunday's race.